براغي ماكينة 5/16-18 × 5-1/2" | رأس مسطح فيليبس | فولاذ مطلي بالزنك (100 / عبوة)

These were exactly the right length to secure some heavy shelf brackets in my garage. The Phillips heads bit cleanly without any cam-out, and the zinc coating seems decently thick.

Used a full pack mounting a pergola bracket to a beam, and every single one seated cleanly without stripping. The zinc finish has held up through a few rainstorms already, so the corrosion resistance is doing its job.

These are longer than I expected for the size, and the flat heads sit perfectly flush in my jig. The zinc coating is a nice touch, they’ve held up well in my damp garage without any rust so far.